787643 divided by 86 
Let's see how many times 86 fits into 787643.

Step 1:
86 goes into 7 0 times with a remainder of 7.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 7, we end up with 7.
Grab the next digit (8) from the dividend, add it to 7, then carry on: 78 / 86

Advancing to step 2:
78 divided by 86 is 0 with a remainder of 78.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 78, we end up with 78.
Append the next digit (7) from the dividend to 78 and continue with: 787 / 86

Moving on to step 3:
86 can be fit into 787 9 times, resulting in a remainder of 13.
Put 9 as the next digit of the answer. 
Result so far: 9.0
Subtract 774 from 787 to get 13.
Bring next digit (6) of the dividend behind the 13 and repeat the process: 136 / 86

Let's proceed to step 4:
When dividing 136 by 86, we get 1 with a remainder of 50.
The number 1 becomes the next digit in our result. 
Result so far: 91.0
Subtracting 86 from 136 leaves us with 50.
Append the next digit (4) from the dividend to 50 and continue with: 504 / 86

Step 5:
504 divided by 86 is 5 with a remainder of 74.
Record the quotient 5 as the next digit in the result. 
Result so far: 915.0
The remainder is 74 after subtracting 430 from 504.
Include the next digit (3) from the dividend after 74, then repeat: 743 / 86

On to step 6:
When dividing 743 by 86, we get 8 with a remainder of 55.
The next digit of our result is 8. 
Result so far: 9158.0
Subtract 688 from 743 to get 55.
Since there are no more digits in the dividend, we add a zero to the remainder making it 550, and continue the process.

Advancing to step 7:
86 can be fit into 550 6 times, resulting in a remainder of 34.
The next digit of our result is 6. 
Result so far: 9158.6
Subtracting 516 from 550 leaves us with 34.
Since there are no more digits in the dividend, we add a zero to the remainder making it 340, and continue the process.

Going ahead to step 8:
If we divide 340 by 86, we get 3 and a remainder of 82.
The number 3 becomes the next digit in our result. 
Result so far: 9158.63
If we subtract 258 from 340, we get 82.
Since there are no more digits in the dividend, we add a zero to the remainder making it 820, and continue the process.

Let's proceed to step 9:
If we divide 820 by 86, we get 9 and a remainder of 46.
Use 9 as the next digit of our solution. 
Result so far: 9158.639
Subtract 774 from 820 to get 46.
Since there are no more digits in the dividend, we add a zero to the remainder making it 460, and continue the process.

Going ahead to step 10:
86 can be fit into 460 5 times, resulting in a remainder of 30.
Record the quotient 5 as the next digit in the result. 
Result so far: 9158.6395
If we subtract 430 from 460, we get 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Moving on to step 11:
86 goes into 300 3 times with a remainder of 42.
The next digit of our result is 3. 
Result so far: 9158.63953
Subtract 258 from 300 to get 42.
Since there are no more digits in the dividend, we add a zero to the remainder making it 420, and continue the process.

Advancing to step 12:
The number 86 fits into 420 4 times, leaving a remainder of 76.
The number 4 becomes the next digit in our result. 
Result so far: 9158.639534
If we take 344 away from 420, we end up with 76.
Since there are no more digits in the dividend, we add a zero to the remainder making it 760, and continue the process.

Moving on to step 13:
When dividing 760 by 86, we get 8 with a remainder of 72.
Record the quotient 8 as the next digit in the result. 
Result so far: 9158.6395348
The remainder is 72 after subtracting 688 from 760.
Since there are no more digits in the dividend, we add a zero to the remainder making it 720, and continue the process.

Advancing to step 14:
86 can be fit into 720 8 times, resulting in a remainder of 32.
Use 8 as the next digit of our solution. 
Result so far: 9158.63953488
If we subtract 688 from 720, we get 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

The quotient of the division is 9158.63953488, and the remainder is 3.2e-08.